Import XaoS r489 (trunk after version 3.5)

1 files changed, 95 insertions, 0 deletions

diff --git a/src/util/help.c b/src/util/help.c
new file mode 100644
index 0000000..adaabb7
--- /dev/null
+++ b/src/util/help.c
@@ -0,0 +1,95 @@
+#ifdef _plan9_
+#include <u.h>
+#include <libc.h>
+#else
+#include <stdlib.h>
+#endif
+#include <ctype.h>
+#include <config.h>
+#include <xio.h>
+#include <xshl.h>
+struct helpstatus {
+    int eol;
+    xio_file file;
+};
+static int gethelp(void *userdata)
+{
+    struct helpstatus *s = (struct helpstatus *) userdata;
+    int c = xio_getc(s->file);
+    if (c == '\r')
+	return (gethelp(userdata));
+    if (c < 0 || c > 255)
+	return 0;
+    if (c == '%' && s->eol)
+	return 0;
+    s->eol = (c == '\n');
+    return c;
+}
+
+struct xshl_line *help_make(CONST char *command,
+			    int getwidth(void *, int flags,
+					 CONST char *text), int width,
+			    int smallheight, int bigheight)
+{
+    struct helpstatus *s = (struct helpstatus *) malloc(sizeof(*s));
+    struct xshl_line *line;
+    s->file = xio_gethelp();
+    if (s->file == XIO_FAILED) {
+	free(s);
+	return 0;
+    }
+    s->eol = 1;
+    while (1) {
+	int c;
+	c = xio_getc(s->file);
+	if (c == '%' && s->eol) {
+	    c = xio_getc(s->file);
+	    do {
+		int i = 0;
+		i = 0;
+		while (command[i] && c == command[i]) {
+		    c = xio_getc(s->file);
+		    i++;
+		}
+		if (!command[i]) {
+		    if (isspace(c)) {
+			while (c != '\n' && !xio_feof(s->file))
+			    c = xio_getc(s->file);
+			line =
+			    xshl_interpret(s, gethelp, width, getwidth, 0,
+					   smallheight, bigheight);
+			xio_close(s->file);
+			free(s);
+			return (line);
+		    }
+		} else {
+		    while (c != '\n' && c != ' ' && !xio_feof(s->file))
+			c = xio_getc(s->file);
+		    if (c == ' ')
+			while (c == ' ')
+			    c = xio_getc(s->file);
+		}
+	    }
+	    while (c != '\n' && !xio_feof(s->file));
+	}			/*c==% */
+	s->eol = (c == '\n');
+	if (xio_feof(s->file)) {
+	    xio_close(s->file);
+	    return NULL;
+	}
+    }				/*while 1 */
+}
+
+#if _NEVER_
+void help_print(char *name, int skip, int width)
+{
+    struct xshl_line *l;
+    l = help_make(name, xshl_textlen, width, 1, 1);
+    if (l == NULL) {
+	printf("Help not available!\n");
+	return;
+    }
+    xshl_print(skip, l);
+    xshl_free(l);
+}
+#endif